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Since the spacecraft environment simulation equipment needs to be clean and oil-free, and for many gases, especially high vacuum pumps that require a large pumping speed for oxygen, large-diameter cryopumps are the best choice. Initially, imported pumps are used, but due to the United States, Japan and other countries. All of these devices have been embargoed, which requires a path of independent research and development.
After receiving the task, the technician first completed the review and design work through absorption, summarization, comparison, innovation, and theoretical verification, and then successfully completed the development of the test system and the repeated comparison verification test of various test methods; Body installation, joint adjustment and cryogenic pump performance parameter test, the results show excellent performance in all aspects. After the joint operation of the 507 extra-space spacesuit experimental cabin system, the cryopump was operating normally. The results show that the performance indexes of the four "Shenzhou" brand cryogenic pumps all meet the design requirements, and the performance indicators reach the same level of the same-diameter pumps in developed countries.
The development of cryopumps has broken the blockade of China's large pumping speed vacuum technology in the United States, Japan and other countries. For the first time, it has developed a large-diameter high-precision cryopump performance test equipment that combines the flow method and the flow conductance method.
China Aerospace News Network recently conducted an acceptance test of the high-vacuum refrigerator cryogenic pump project for the extravehicular spacesuit test cabin developed by the General Auxiliary and Environmental Engineering Department of the Aerospace Five Institute. Experts and leaders listened carefully to the technicians on low temperature. The pump's development summary report and unanimous approval of the cryopump acceptance, the acceptance team fully affirmed the technical team's achievements in this tough battle, and highly praised the performance of the cryogenic pump developed by the Ministry.